基于 CS3308的多通道 TVG 控制设计与实现

摘要

多波束测深声呐是用于测量海底地形地貌的设备，作为主动声呐，抗混响是其关键技术之一。本文提出抗混响的 TVG 控制方案，设计基于 CS3308的多通道 TVG 控制电路，具备固定增益设定、常用 TVG 曲线固化模式和实时 TVG 曲线下载等功能。与以往的设计方法相比，该方案具有设计简单、体积小、控制灵活等特点。试验结果表明，文中设计的 TVG 控制电路工作稳定可靠，增益调节范围–96 dB～+22 dB，步进1/2 dB 或1/4 dB 可选。%The multi-beam bathymeter sonar is a seafloor mapping device. As an active sonar, it is one of important technique to suppress reverberation. The design of TVG multi-channel controlling based on CS3308 is proposed to resist sea-bed reverberation in the paper. A certain gain or usual TVG control line can be set and real-time TVG line can be loaded. Comparing with the previous design, it has features of simple, small size and flexible control. The result of test showed that the TVG control cir works stably and reliably. It has wide adjustable volume range from –96 dB to + 22 dB in 1/2 dB or 1/4 dB steps.